static bool bracketPairDefinesRegion( const BracketPair & bracketPair )
{
Q_ASSERT(bracketPair.first.isValid());
Q_ASSERT(bracketPair.second.isValid());
if ( bracketPair.first->character != '(' || bracketPair.second->character != ')' )
return false;
if (!tokenIsFirstAndOnlyInBlock(bracketPair.second) || !tokenIsFirstAndOnlyInBlock(bracketPair.second))
return false;
// check whether this is an Event
TokenIterator it = bracketPair.first.next();
if (it.isValid()) {
if (it->type == Token::SymbolArg)
return false;
else {
++it;
if (it.isValid() && it->character == ':')
return false;
}
}
return true;
}
QTextCursor ScCodeEditor::selectionForPosition( int position )
{
QTextBlock block( textDocument()->findBlock(position) );
if (!block.isValid())
return QTextCursor();
int positionInBlock = position - block.position();
TokenIterator it = TokenIterator( block, positionInBlock );
if (it.type() == Token::Unknown) {
// Token is invalid, or Token::Unknown (i.e. punctuations).
// Prefer token at previous position.
TokenIterator alternativeIt = TokenIterator( block, positionInBlock - 1 );
if (alternativeIt.isValid())
it = alternativeIt;
}
if (it.isValid()) {
switch (it->type) {
case Token::OpeningBracket:
case Token::ClosingBracket:
{
BracketPair match;
matchBracket(it, match);
if (match.first.isValid() && match.second.isValid()) {
int start = match.first.position();
int end = match.second.position() + 1;
QTextCursor selection(textDocument());
if (it == match.second) {
selection.setPosition(start);
selection.setPosition(end, QTextCursor::KeepAnchor);
} else {
selection.setPosition(end);
selection.setPosition(start, QTextCursor::KeepAnchor);
}
return selection;
}
break;
}
default:
QTextCursor selection( textDocument() );
selection.setPosition( it.position() );
selection.setPosition( selection.position() + it->length, QTextCursor::KeepAnchor );
return selection;
}
}
return QTextCursor();
}
void ScCodeEditor::gotoPreviousRegion()
{
QTextCursor cursor = textCursor();
int cursorPosition = cursor.position();
BracketPair prevBracketPair;
BracketPair bracketPair;
TokenIterator it = TokenIterator::rightOf( textDocument()->begin(), 0 );
while(it.isValid()) {
nextBracketPair(it, bracketPair);
if ( !bracketPair.second.isValid()
|| bracketPair.second.position() >= cursorPosition - 1 )
{
break;
}
if (bracketPairDefinesRegion(bracketPair)) {
prevBracketPair = bracketPair;
}
it = bracketPair.second;
}
if ( prevBracketPair.first.isValid() && prevBracketPair.second.isValid() )
{
setTextCursor( cursorAt(prevBracketPair.second, 1) );
return;
}
cursor.movePosition(QTextCursor::Start);
setTextCursor(cursor);
}
QTextCursor ScCodeEditor::regionAroundCursor(const QTextCursor & cursor)
{
int cursorPosition = cursor.position();
BracketPair bracketPair;
TokenIterator it = TokenIterator::rightOf( textDocument()->begin(), 0 );
while (it.isValid()) {
nextBracketPair(it, bracketPair);
if (bracketPair.first.isValid() && bracketPair.first.position() < cursorPosition)
{
if ( bracketPair.second.isValid() && bracketPair.second.position() >= cursorPosition
&& bracketPairDefinesRegion(bracketPair) )
{
QTextCursor regionCursor(QPlainTextEdit::document());
regionCursor.setPosition(bracketPair.first.position() + 1);
regionCursor.setPosition(bracketPair.second.position(), QTextCursor::KeepAnchor);
return regionCursor;
}
} else {
break;
}
it = bracketPair.second;
}
return QTextCursor();
}
inline static bool tokenIsFirstAndOnlyInBlock( const TokenIterator & it )
{
Q_ASSERT(it.isValid());
bool result = it->positionInBlock == 0;
result = result && static_cast<TextBlockData*>(it.block().userData())->tokens.size() == 1;
return result;
}
QTextCursor ScCodeEditor::cursorAt(const TokenIterator it, int offset)
{
Q_ASSERT(it.isValid());
QTextCursor textCursor(textDocument());
textCursor.setPosition(it.position() + offset);
return textCursor;
}
inline static bool tokenMaybeRegionEnd( const TokenIterator & it )
{
Q_ASSERT(it.isValid());
if (it->character != ')')
return false;
TokenIterator next_it = it.next();
return (!next_it.isValid() ||
next_it.block() != it.block() ||
next_it->character == ';');
}
static bool bracketPairDefinesRegion( const BracketPair & bracketPair )
{
Q_ASSERT(bracketPair.first.isValid());
Q_ASSERT(bracketPair.second.isValid());
if (!tokenMaybeRegionStart(bracketPair.first) || !tokenMaybeRegionEnd(bracketPair.second))
return false;
// check whether this is an Event
TokenIterator it = bracketPair.first.next();
if (it.isValid()) {
if (it->type == Token::SymbolArg)
return false;
else {
++it;
if (it.isValid() && it->character == ':')
return false;
}
}
return true;
}
void ScCodeEditor::matchBracket( const TokenIterator & bracket, BracketPair & match )
{
Q_ASSERT(bracket.isValid());
switch(bracket->type) {
case Token::OpeningBracket:
match.first = bracket;
match.second = nextClosingBracket(bracket.next());
break;
case Token::ClosingBracket:
match.second = bracket;
match.first = previousOpeningBracket(bracket.previous());
break;
default:
match.first = TokenIterator();
match.second = TokenIterator();
}
}
void ScCodeEditor::gotoNextBlock()
{
QTextCursor cursor = textCursor();
TokenIterator tokenIt = TokenIterator::rightOf( cursor.block(), cursor.positionInBlock() );
if (tokenIt.type() == Token::OpeningBracket
&& tokenIt.block() == cursor.block()
&& tokenIt->positionInBlock == cursor.positionInBlock())
++tokenIt;
tokenIt = nextClosingBracket( tokenIt );
if (tokenIt.isValid())
setTextCursor( cursorAt(tokenIt, 1) );
else {
cursor.movePosition( QTextCursor::End );
setTextCursor( cursor );
}
}
void ScCodeEditor::gotoPreviousBlock()
{
QTextCursor cursor = textCursor();
TokenIterator tokenIt = TokenIterator::leftOf(cursor.block(), cursor.positionInBlock());
if (tokenIt.type() == Token::ClosingBracket
&& tokenIt.block() == cursor.block()
&& tokenIt->positionInBlock == cursor.positionInBlock() - 1)
--tokenIt;
tokenIt = previousOpeningBracket( tokenIt );
if (tokenIt.isValid())
setTextCursor( cursorAt(tokenIt) );
else {
cursor.movePosition( QTextCursor::Start );
setTextCursor( cursor );
}
}
// taking nested brackets into account
TokenIterator ScCodeEditor::previousOpeningBracket(TokenIterator it)
{
int level = 0;
while (it.isValid()) {
switch (it->type) {
case Token::OpeningBracket:
if (level == 0)
return it;
--level;
break;
case Token::ClosingBracket:
++level;
default:
break;
}
--it;
}
return it;
}
void ScCodeEditor::gotoNextRegion()
{
QTextCursor cursor = textCursor();
int cursorPosition = cursor.position();
BracketPair bracketPair;
TokenIterator it = TokenIterator::rightOf( textDocument()->begin(), 0 );
while (it.isValid()) {
nextBracketPair(it, bracketPair);
if ( bracketPair.first.isValid() && bracketPair.second.isValid()
&& bracketPair.first.position() > cursorPosition
&& bracketPairDefinesRegion(bracketPair))
{
setTextCursor( cursorAt(bracketPair.first) );
return;
}
it = bracketPair.second;
}
cursor.movePosition(QTextCursor::End);
setTextCursor(cursor);
}
inline static bool tokenMaybeRegionStart( const TokenIterator & it )
{
Q_ASSERT(it.isValid());
return ( it->character == '(' && it->positionInBlock == 0 );
}
